Thunderbird 8.0 and AVG

OK I now have 8.0 version installed and as usual the add-ons go through the usual brooohahhhh some work some don't etc. Well it tells me the AVG email scanner has gone the way of the Dodo bird. Funny part is when an email comes in the AVG email notification window pops up and says it is scanning the email. Who do I believe?

I Googled the problem before coming here and answer was that I should get a "personal email scanner" I don't have a clue. Not too worried as I don't click on any email links but a friend is having a problem with his PC sending emails that he does not know anything about. I received a couple of these but after opening the email did not open anything else and just deleted it. Any ideas.